CN111672939A - Simple manual correction device and correction method for deformation of thin-wall large-caliber butt welding pipeline opening - Google Patents
Simple manual correction device and correction method for deformation of thin-wall large-caliber butt welding pipeline opening Download PDFInfo
- Publication number
- CN111672939A CN111672939A CN202010646133.1A CN202010646133A CN111672939A CN 111672939 A CN111672939 A CN 111672939A CN 202010646133 A CN202010646133 A CN 202010646133A CN 111672939 A CN111672939 A CN 111672939A
- Authority
- CN
- China
- Prior art keywords
- welding
- arc
- gear jack
- pipeline
- butt
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D3/00—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
- B21D3/10—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts between rams and anvils or abutments
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/053—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work aligning cylindrical work; Clamping devices therefor
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention discloses a simple manual correction device and a simple manual correction method for deformation of a thin-wall large-caliber butt-welded pipeline port, which solve the problem of how to correct the shape of two pipeline ports before butt welding of the two pipeline ports so as to meet the requirement of butt welding. Each pipeline is lifted and pulled by two narrow trolleys and conveyed to the pipeline installation position of the existing workshop, the defect that the existing workshop cannot pass through hoisting equipment and the conveying channel is limited is overcome, and an arc-shaped supporting plate is arranged on each trolley, so that the two pipelines which are butt-welded are positioned in the arc-shaped supporting plate; arranging an arc-shaped supporting plate outer side vertical surface, a trolley body outer side vertical surface and oppositely welded pipe orifices, wherein the arc-shaped supporting plate outer side vertical surface, the trolley body outer side vertical surface and the oppositely welded pipe orifices are positioned on the same vertical surface, and enabling the trolley body outer side vertical surface of a rear trolley of the front trolley group to be abutted against the trolley body outer side vertical surface of a front trolley of the rear trolley group so as to finish accurate butt joint and alignment of the two welded pipe orifices; the invention greatly reduces the difficulty of alignment operation, is simple and easy to implement on site, and greatly improves the alignment welding quality.
Description
Technical Field
The invention relates to a deformation correction device for a butt welding pipeline opening, in particular to a deformation correction device and a deformation correction method for a thin-wall large-caliber butt welding pipeline opening.
Background
In the construction process of large-diameter pipelines of air-cooled exhaust pipelines, steam turbine rooms and boiler rooms, because the large-diameter pipelines have too large external dimensions, the pipeline wall thickness is thin, the deformation of the welded pipeline openings is often caused by the influence of gravity or the collision in the pipeline transportation process, the two welded pipeline openings cannot be accurately positioned and butted, the welding quality is poor, the appearance quality of welding seams is poor, and the design and specification requirements cannot be met; how to shape the two pipeline mouths before butt welding to meet the requirement of butt welding becomes a technical problem to be solved on site.
Disclosure of Invention
The invention provides a simple manual correction device and a simple manual correction method for deformation of a thin-wall large-caliber butt-welded pipeline port, which solve the technical problem of how to correct the shape of two pipeline ports before butt welding of the two pipeline ports so as to meet the requirement of butt welding.
The invention solves the technical problems by the following technical scheme:
the general concept of the invention is: each pipeline is lifted and pulled by two narrow trolleys and conveyed to the pipeline installation position of the existing workshop, the defect that the existing workshop cannot pass through hoisting equipment and the conveying channel is limited is overcome, and meanwhile, an arc-shaped supporting plate is arranged on each trolley, so that the two pipelines which are butt-welded are positioned in the arc-shaped supporting plate; arranging an arc-shaped supporting plate outer side vertical surface, a trolley body outer side vertical surface and oppositely welded pipe orifices, wherein the arc-shaped supporting plate outer side vertical surface, the trolley body outer side vertical surface and the oppositely welded pipe orifices are positioned on the same vertical surface, the trolley body outer side vertical surface of a rear trolley of a front trolley group and the trolley body outer side vertical surface of a front trolley of the rear trolley group are abutted together, accurate butt joint and alignment of the two welded pipe orifices are completed, finally, two butt welded pipes are synchronously lifted to the same height through chain blocks on portal frames of the two groups of trolleys, and finally, opposite welding is carried out; the invention changes the welding butt positioning of two welding pipe orifices into the butt positioning of two outer side vertical surfaces of two trolleys, greatly reduces the difficulty of the butt operation, is simple and easy to implement on site, and greatly improves the quality of the butt welding; the narrow-body trolley has the double functions of conveying pipelines and accurately butting pipe orifices.
A simple manual correcting device for deformation of a thin-wall large-caliber butt welding pipeline opening comprises a base plate, wherein a butt welding left side pipeline and a butt welding right side pipeline are respectively arranged on the base plate, a bearing seat base is arranged between a welding pipe opening of the butt welding left side pipeline and a welding pipe opening of the butt welding right side pipeline, a bearing seat is fixedly arranged on the bearing seat base, a central shaft with double-end output is arranged in the bearing seat, and the central shaft line of the central shaft, the central shaft line of the butt welding left side pipeline and the central shaft line of the butt welding right side pipeline are arranged on the same line; the side surface of the left shaft end shaft of the central shaft is respectively provided with a left upper gear jack and a left lower gear jack, the central axis of the left upper gear jack and the central axis of the left lower gear jack are on the same straight line, and the straight line is vertical to the central axis of the central shaft; a right upper gear jack and a right lower gear jack are respectively arranged on the side surface of the right shaft end shaft of the central shaft, the central axis of the right upper gear jack and the central axis of the right lower gear jack are arranged on the same straight line, and the straight line is vertical to the central axis of the central shaft; be connected with top arc integer plate between the output axle head of upper left gear jack and the output axle head of upper right gear jack, top arc integer plate top joint is between the welding mouth of pipe of butt welding left side pipeline and the welding mouth of pipe of butt welding right side pipeline, the output axle head of gear jack is connected with lower left bottom arc integer plate down on a left side, lower left bottom arc integer plate top joint is in the welding mouth of pipe of butt welding left side pipeline, the output axle head of gear jack is connected with lower right bottom arc integer plate down on a right side, lower right bottom arc integer plate top joint is in the welding mouth of pipe of butt welding right side pipeline.
The radian of top arc integer is 45 degrees to 90 degrees, and the radian of bottom arc integer under the right side in the left side are 45 degrees to 90 degrees.
A correction method of a simple manual correction device for deformation of a thin-wall large-caliber butt welding pipeline opening comprises the following steps:
firstly, placing the left end of a top arc-shaped shaping plate and a left lower bottom arc-shaped shaping plate into a welding pipe orifice of a butt welding left side pipeline, and placing the right end of the top arc-shaped shaping plate and a right lower bottom arc-shaped shaping plate into a welding pipe orifice of a butt welding right side pipeline;
secondly, manually operating the left lower gear jack to enable an output shaft of the left lower gear jack to drive the left lower bottom arc-shaped shaping plate to be abutted to the lower part of a welding pipe orifice of the butt welding left side pipeline; the output shaft of the right lower gear jack drives the arc-shaped shaping plate at the lower right bottom to be abutted to the lower part of a welding pipe orifice of a butt welding right side pipeline through manually operating the right lower gear jack; the top arc-shaped shaping plate is lifted by manually operating the left upper gear jack and the right upper gear jack simultaneously and is abutted between the upper part of a welding pipe orifice of the left butt welding pipeline and the upper part of a welding pipe orifice of the right butt welding pipeline simultaneously, so that the shaping of the upper part and the lower part of the welding pipe orifice is realized;
thirdly, manually operating a left upper gear jack, a left lower gear jack, a right upper gear jack and a right lower gear jack respectively to enable the top arc-shaped shaping plate to descend and enable the left lower bottom arc-shaped shaping plate and the right lower bottom arc-shaped shaping plate to ascend;
and fourthly, after the central shaft is rotated for 90 degrees, manually operating the left upper gear jack, the left lower gear jack, the right upper gear jack and the right lower gear jack respectively to enable the top arc-shaped shaping plate, the left lower arc-shaped shaping plate and the right lower arc-shaped shaping plate to rise, enabling the top arc-shaped shaping plate to abut between the front part of a welding pipe orifice of the pipeline on the left side of butt welding and the front part of a welding pipe orifice of the pipeline on the right side of butt welding, enabling the left lower arc-shaped shaping plate to abut on the rear part of the welding pipe orifice of the pipeline on the left side of butt welding, enabling the right lower arc-shaped shaping plate to abut on the rear part of the welding pipe orifice of the pipeline on the right side of butt welding, and shaping the front part.
The invention realizes the simultaneous shaping of the butt welding position of two welded pipe orifices, ensures the accuracy of butt welding and butt joint, is convenient for assembling and disassembling equipment and can effectively accelerate the construction progress.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a sectional view taken along line a-a in fig. 1.
Detailed Description
The invention is described in detail below with reference to the accompanying drawings:
a simple manual correcting device for deformation of a thin-wall large-caliber butt welding pipeline opening comprises a base plate 1, wherein a butt welding left side pipeline 2 and a butt welding right side pipeline 3 are respectively arranged on the base plate 1, a bearing seat base 4 is arranged between a welding pipe opening of the butt welding left side pipeline 2 and a welding pipe opening of the butt welding right side pipeline 3, a bearing seat 5 is fixedly arranged on the bearing seat base 4, a central shaft 6 with double-end output is arranged in the bearing seat 5, and the central axis of the central shaft 6, the central axis of the butt welding left side pipeline 2 and the central axis of the butt welding right side pipeline 3 are arranged on the same line; a left upper gear jack 7 and a left lower gear jack 9 are respectively arranged on the side surface of the left shaft end shaft of the central shaft 6, the central axis of the left upper gear jack 7 and the central axis of the left lower gear jack 9 are on the same straight line, and the straight line is vertical to the central axis of the central shaft 6; a right upper gear jack 11 and a right lower gear jack 12 are respectively arranged on the right shaft end shaft side surface of the central shaft 6, the central axis of the right upper gear jack 11 and the central axis of the right lower gear jack 12 are arranged on the same straight line, and the straight line is vertical to the central axis of the central shaft 6; a top arc-shaped shaping plate 8 is connected between the output shaft end of the left upper gear jack 7 and the output shaft end of the right upper gear jack 11, the top arc-shaped shaping plate 8 is abutted between the welding pipe orifice of the butt welding left side pipeline 2 and the welding pipe orifice of the butt welding right side pipeline 3, the output shaft end of the left lower gear jack 9 is connected with a left lower bottom arc-shaped shaping plate 10, the left lower bottom arc-shaped shaping plate 10 is abutted in the welding pipe orifice of the butt welding left side pipeline 2, the output shaft end of the right lower gear jack 12 is connected with a right lower bottom arc-shaped shaping plate 13, and the right lower bottom arc-shaped shaping plate 13 is abutted in the welding pipe orifice of the butt welding right side pipeline 3; the left upper gear jack 7 and the left lower gear jack 9 are arranged in a reverse direction on a straight line, so that the jacking force of the top arc-shaped shaping plate 8 and the left lower arc-shaped shaping plate 10 to the mouth of the welding pipeline is equal, and the uniform shaping of the mouth of the pipeline is ensured.
The radian of the top arc-shaped shaping plate 8 ranges from 45 degrees to 90 degrees, and the radian of the left lower bottom arc-shaped shaping plate 10 and the radian of the right lower bottom arc-shaped shaping plate 13 both range from 45 degrees to 90 degrees; the purpose of rounding the weld joint is achieved by rotating the central shaft 6.
A correction method of a simple manual correction device for deformation of a thin-wall large-caliber butt welding pipeline opening comprises the following steps:
firstly, placing the left end of a top arc-shaped shaping plate 8 and a left lower bottom arc-shaped shaping plate 10 into a welding pipe orifice of a butt welding left side pipeline 2, and placing the right end of the top arc-shaped shaping plate 8 and a right lower bottom arc-shaped shaping plate 13 into a welding pipe orifice of a butt welding right side pipeline 3;
secondly, manually operating the left lower gear jack 9 to enable an output shaft of the left lower gear jack 9 to drive the left lower bottom arc-shaped shaping plate 10 to be abutted and welded to the lower part of a welding pipe orifice of the left welding pipeline 2; the output shaft of the right lower gear jack 12 drives the right lower bottom arc-shaped shaping plate 13 to butt-joint the lower part of the welding pipe orifice of the butt welding right side pipeline 3 by manually operating the right lower gear jack 12; the top arc-shaped shaping plate 8 is lifted by manually operating the left upper gear jack 7 and the right upper gear jack 11 simultaneously, and is simultaneously abutted between the upper part of the welding pipe orifice of the butt welding left side pipeline 2 and the upper part of the welding pipe orifice of the butt welding right side pipeline 3, so that the shaping of the upper part and the lower part of the welding pipe orifice is realized;
thirdly, the top arc-shaped shaping plate 8 is lowered and the left lower bottom arc-shaped shaping plate 10 and the right lower bottom arc-shaped shaping plate 13 are raised through manually operating the left upper gear jack 7, the left lower gear jack 9, the right upper gear jack 11 and the right lower gear jack 12 respectively;
and fourthly, after the central shaft 6 is rotated by 90 degrees, manually operating the left upper gear jack 7, the left lower gear jack 9, the right upper gear jack 11 and the right lower gear jack 12 respectively to lift the top arc-shaped shaping plate 8, the left lower arc-shaped shaping plate 10 and the right lower arc-shaped shaping plate 13, enabling the top arc-shaped shaping plate 8 to be abutted and welded between the front part of a welding pipe orifice of the butt welding left-side pipeline 2 and the front part of a welding pipe orifice of the butt welding right-side pipeline 3, enabling the left lower arc-shaped shaping plate 10 to be abutted and welded at the rear part of the welding pipe orifice of the butt welding left-side pipeline 2, enabling the right lower arc-shaped shaping plate 13 to be abutted and welded at the rear part of the welding pipe orifice of the butt welding right-side pipeline 3, and shaping the front and rear parts of the.
Claims (3)
1. A simple manual correcting device for deformation of a thin-wall large-caliber butt welding pipeline opening comprises a base plate (1), wherein a butt welding left side pipeline (2) and a butt welding right side pipeline (3) are respectively arranged on the base plate (1), and is characterized in that a bearing seat base (4) is arranged between a welding pipe opening of the butt welding left side pipeline (2) and a welding pipe opening of the butt welding right side pipeline (3), a bearing seat (5) is fixedly arranged on the bearing seat base (4), a central shaft (6) with two ends outputting is arranged in the bearing seat (5), and the central axis of the central shaft (6), the central axis of the butt welding left side pipeline (2) and the central axis of the butt welding right side pipeline (3) are arranged on the same line; a left upper gear jack (7) and a left lower gear jack (9) are respectively arranged on the side surface of the left shaft end shaft of the central shaft (6), the central axis of the left upper gear jack (7) and the central axis of the left lower gear jack (9) are on the same straight line, and the straight line is vertical to the central axis of the central shaft (6); a right upper gear jack (11) and a right lower gear jack (12) are respectively arranged on the right shaft end shaft side surface of the central shaft (6), the central axis of the right upper gear jack (11) and the central axis of the right lower gear jack (12) are arranged on the same straight line, and the straight line is vertical to the central axis of the central shaft (6); be connected with top arc integer board (8) between the output axle head of upper left gear jack (7) and the output axle head of upper right gear jack (11), top arc integer board (8) butt joint is between the welding mouth of pipe of butt welding left side pipeline (2) and the welding mouth of pipe of butt welding right side pipeline (3), the output axle head of gear jack (9) is connected with lower left bottom arc integer board (10) under a left side, lower left bottom arc integer board (10) butt joint is in the welding mouth of pipe of butt welding left side pipeline (2), the output axle head of gear jack (12) is connected with lower right bottom arc integer board (13) under right, lower right bottom arc integer board (13) butt joint is in the welding mouth of pipe of butt welding right side pipeline (3).
2. The simple manual correction device for the deformation of the thin-wall large-caliber butt welding pipeline port according to claim 1, characterized in that the radian of the top arc-shaped shaping plate (8) ranges from 45 degrees to 90 degrees, and the radian of the left lower bottom arc-shaped shaping plate (10) and the radian of the right lower bottom arc-shaped shaping plate (13) both range from 45 degrees to 90 degrees.
3. The correction method of the simple manual correction device for the deformation of the mouth of the thin-wall large-caliber butt-welded pipeline according to claim 2, comprising the following steps of:
firstly, placing the left end of a top arc-shaped shaping plate (8) and a left lower bottom arc-shaped shaping plate (10) into a welding pipe orifice of a butt welding left side pipeline (2), and placing the right end of the top arc-shaped shaping plate (8) and a right lower bottom arc-shaped shaping plate (13) into a welding pipe orifice of a butt welding right side pipeline (3);
secondly, the left lower gear jack (9) is manually operated, so that the output shaft of the left lower gear jack (9) drives the left lower bottom arc-shaped shaping plate (10) to butt-weld the lower part of the welding pipe orifice of the left welding pipeline (2); the output shaft of the right lower gear jack (12) drives the arc-shaped shaping plate (13) at the lower right bottom to butt-weld the lower part of the welding pipe orifice of the right side welding pipeline (3) by manually operating the right lower gear jack (12); the top arc-shaped shaping plate (8) is lifted by simultaneously manually operating the left upper gear jack (7) and the right upper gear jack (11) and is simultaneously abutted between the upper part of a welding pipe orifice of the butt welding left side pipeline (2) and the upper part of a welding pipe orifice of the butt welding right side pipeline (3), so that the shaping of the upper part and the lower part of the welding pipe orifice is realized;
thirdly, the top arc-shaped shaping plate (8) is lowered and the left lower bottom arc-shaped shaping plate (10) and the right lower bottom arc-shaped shaping plate (13) are raised by manually operating the left upper gear jack (7), the left lower gear jack (9), the right upper gear jack (11) and the right lower gear jack (12) respectively;
and fourthly, after the central shaft (6) is rotated for 90 degrees, manually operating a left upper gear jack (7), a left lower gear jack (9), a right upper gear jack (11) and a right lower gear jack (12) respectively to enable the top arc-shaped shaping plate (8), the left lower arc-shaped shaping plate (10) and the right lower arc-shaped shaping plate (13) to rise, enabling the top arc-shaped shaping plate (8) to be abutted and welded between the front part of a welding pipe orifice of the butt welding left side pipeline (2) and the front part of a welding pipe orifice of the butt welding right side pipeline (3), enabling the left lower arc-shaped shaping plate (10) to be abutted and welded at the rear part of the welding pipe orifice of the butt welding left side pipeline (2), and enabling the right lower arc-shaped shaping plate (13) to be abutted and welded at the rear part of the welding pipe orifice of the butt welding right side pipeline (3), thereby realizing the shaping of the front and rear parts of the.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010646133.1A CN111672939A (en) | 2020-07-07 | 2020-07-07 | Simple manual correction device and correction method for deformation of thin-wall large-caliber butt welding pipeline opening |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010646133.1A CN111672939A (en) | 2020-07-07 | 2020-07-07 | Simple manual correction device and correction method for deformation of thin-wall large-caliber butt welding pipeline opening |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111672939A true CN111672939A (en) | 2020-09-18 |
Family
ID=72457193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010646133.1A Pending CN111672939A (en) | 2020-07-07 | 2020-07-07 | Simple manual correction device and correction method for deformation of thin-wall large-caliber butt welding pipeline opening |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111672939A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115090718A (en) * | 2022-08-26 | 2022-09-23 | 中国能源建设集团山西电力建设有限公司 | Shape correction method before butt welding of pipe orifices of two large-caliber thin-wall steel pipes |
-
2020
- 2020-07-07 CN CN202010646133.1A patent/CN111672939A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115090718A (en) * | 2022-08-26 | 2022-09-23 | 中国能源建设集团山西电力建设有限公司 | Shape correction method before butt welding of pipe orifices of two large-caliber thin-wall steel pipes |
| CN115090718B (en) * | 2022-08-26 | 2022-11-08 | 中国能源建设集团山西电力建设有限公司 | Shape correction method before butt welding of pipe orifices of two large-caliber thin-wall steel pipes |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102218632A (en) | Welding device capable of being overturned automatically | |
| CN212310486U (en) | Simple manual correcting device for deformation of thin-wall large-caliber butt welding pipeline opening | |
| CN208408830U (en) | A kind of thrust wheel special welding machine | |
| CN111922617B (en) | Docking mechanism for welding large-scale pipeline | |
| CN111672939A (en) | Simple manual correction device and correction method for deformation of thin-wall large-caliber butt welding pipeline opening | |
| CN112824010A (en) | Pipeline spin welding is to mouthful device | |
| CN113751955A (en) | Large-scale pipeline welding processing system | |
| CN207205642U (en) | A kind of multi-functional Anti-dislocation steel-pipe welding equipment | |
| CN210908432U (en) | Automatic brazing system of solar panel core frame | |
| CN218016858U (en) | Pipeline welding auxiliary fixtures | |
| CN104084705A (en) | Gas filling bottle welding swinging frame and working method thereof | |
| CN115319415B (en) | BIM-based large-diameter three-way pipeline manufacturing process | |
| KR20110030154A (en) | Automatic welding system and automatic welding method using it | |
| CN115026387B (en) | Semiautomatic welding equipment for gravure plate roller with shaft and clamping welding method thereof | |
| CN203282010U (en) | Arc-shaped plate piece groove machining tool | |
| CN115502602A (en) | Self-forming welding equipment and method for reducing pipe | |
| CN115971781A (en) | Steel pipe longitudinal seam welding machine | |
| CN212761991U (en) | Auxiliary device for pipeline welding | |
| CN203649685U (en) | Automatic welding equipment | |
| CN203973069U (en) | Gas filling bottle welding swing span | |
| CN212145295U (en) | Pipeline welding complete automatic system | |
| CN209919204U (en) | Variable-angle flange plate welding tool | |
| CN218134167U (en) | Shape correcting tool before butt welding of pipe orifices of two large-diameter thin-wall steel pipes | |
| CN111922493A (en) | Steel pipe rotation welding auxiliary device and manufacturing method thereof | |
| CN212683007U (en) | Large-diameter pipeline transferring and butt welding positioning mechanism |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |